Fix build failures.

app/build.gradle

@@ -19,7 +19,6 @@ android {
         externalNativeBuild {
             cmake {
                 arguments "-DANDROID_STL=c++_shared"
-                cppFlags "-Wno-error=cast-function-type-strict"
                 // https://issuetracker.google.com/issues/274493986
                 // Transitive shared library that's added through `add_dependencies` is not taken into
                 // account. This result in liboboe.so and libluajit.so not get included into the final
@@ -172,3 +171,8 @@ dependencies {
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'com.google.oboe:oboe:1.7.0'
 }
+
+// We don't even use Kotlin. Why we have to suffer...
+configurations.implementation {
+    exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jdk8'
+}